People, I need your help with this issue because I cannot find the proper solution to solve it.
the issue is:
**Exception in thread "main" java.lang.NullPointerException
at edu.maimonides.www.progmul3.tps.tp1.Garage.park(Garage.java:57)
at edu.maimonides.www.progmul3.tps.tp1.GarageElPlus.main(Garage.java:29)
Java Result: 1**
// Translation: Auto = Car - Moto = Motorcicle - Camioneta = Van
**Class Park Slot**
public class Park Slot {
private ArrayList<Integer> bigParkSlot =
new ArrayList<>(Arrays.asList(1, 3, 5, 7, 9, 11));
private ArrayList<Integer> avaliableParkSlot =
new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22));
private Map<Integer, String> busyParkSlot = new HashMap<>();
private ArrayList uncoveredParkSlot =
new ArrayList<>(Arrays.asList(11, 12, 13, 14, 15, 16, 17, 18, 19, 20));
private ArrayList coveredParkSlot =
new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
}
**Class Garage**
// Line 57
// the problem is here
ArrayList<Integer> pElem = c.getavaliableParkSlot();
int num = pElem.iterator().next();